Complex permittivity and microwave heating behavior of rod-shaped SiC and oxide (SiO2, Al2O3) mixtures

被引：10

作者：

Yoshikawa, Noboru ^{[1
]}

Seki, Kohsaku ^{[2
]}

Inoue, Naoki ^{[2
]}

Komarov, Sergey ^{[1
]}

Kashimura, Kei-ichirou ^{[3
]}

Fujii, Takashi ^{[3
]}

Fukushima, Hideoki ^{[4
]}

机构：

[1] Tohoku Univ, Grad Sch Environm Studies, Aoba Ku, 6-6-02 Aza Aoba, Sendai, Miyagi 9808579, Japan

[2] Tohoku Univ, Aoba Ku, 6-6-02 Aza Aoba, Sendai, Miyagi 9808579, Japan

[3] Chubu Univ, Coll Engn, 1200 Matsurnoto Cho, Kasugai, Aichi 4878501, Japan

[4] Toyota Cent Res & Dev Labs Inc, 41-1 Yokomichi, Nagakute, Aichi 4801192, Japan

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2019年 / 234卷

关键词：

Silicon carbide; Permittivity; Powder mixture; Microwave heating; Mixing rule; MAGNETIC-PROPERTIES; CRYSTAL-STRUCTURE; COMPOSITES; POWDER;

D O I：

10.1016/j.matchemphys.2019.05.093

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Permittivity measurement and microwave heating characteristics of rod-shaped SiC (fragmented SiC fiber) mixed with SiO2 or Al2O3 were investigated, comparing with the mixtures of other two kinds of SiC materials. Rod-shaped SiC mixtures had larger permittivity (both real and especially imaginary parts) than the other SiC mixtures, and a broad peak of loss factor (epsilon(r)'') appeared around 1 GHz. Effective permittivity of mixtures was not successfully fitted by Maxwell-Garnett mixing law to the rod-shaped SiC mixtures but well fitted to other kinds of SiC mixtures. The microwave heating ability of rod-shaped SiC mixtures were much superior to that of other SiC mixtures, as expected from the larger loss factors. However, differences were observed between the mixture of rod-shaped SiC with SiO2 and with gamma-Al2O3 in heating behavior and in the mixture permittivity. Interactions of the rod SiC are considered different between SiO2 and gamma-Al2O3 and influenced the experimental heating data.

引用

页码：281 / 287

页数：7

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